该范例使用 OpenSchema 方法显示 Pubs 数据库内每个表的名称和类型。
Public Sub OpenSchemaX()
Dim cnn1 As ADODB.Connection
Dim rstSchema As ADODB.Recordset
Dim strCnn As String
Set cnn1 = New ADODB.Connection
strCnn = "Provider=sqloledb;" & _
"Data Source=srv;Initial Catalog=pubs;User Id=sa;Password=; "
cnn1.Open strCnn
Set rstSchema = cnn1.OpenSchema(adSchemaTables)
Do Until rstSchema.EOF
Debug.Print "Table name: " & _
rstSchema!TABLE_NAME & vbCr & _
"Table type: " & rstSchema!TABLE_TYPE & vbCr
rstSchema.MoveNext
Loop
rstSchema.Close
cnn1.Close
End Sub
该范例在 OpenSchema 方法的 Criteria 参数中指定 TABLE_TYPE 查询约束。因此,只返回在 Pubs 数据库中指定视图的模式信息。然后该范例显示每个表的名称和类型。
Public Sub OpenSchemaX2()
Dim cnn2 As ADODB.Connection
Dim rstSchema As ADODB.Recordset
Dim strCnn As String
Set cnn2 = New ADODB.Connection
strCnn = "Provider=sqloledb;" & _
"Data Source=srv;Initial Catalog=pubs;User Id=sa;Password=; "
cnn2.Open strCnn
Set rstSchema = cnn2.OpenSchema(adSchemaTables, Array(Empty, Empty, Empty, "VIEW"))
Do Until rstSchema.EOF
Debug.Print "Table name: " & _
rstSchema!TABLE_NAME & vbCr & _
"Table type: " & rstSchema!TABLE_TYPE & vbCr
rstSchema.MoveNext
Loop
rstSchema.Close
cnn2.Close
End Sub